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Use this tag to ask about band-structure formation in solids, or about how electrons and holes behave inside them.

1 vote
0 answers
180 views

Are there still no "simple analytical proofs" of Bloch's theorem in three dimensions?

Section 2.1.2 of Sydney G. Davison and Maria Stęślicka's 1992 Basic Theory of Surface States says: 2.1.2 Bloch theorem The generalization of the Bloch-Floquet theorem to three dimensions is fairly ob …
uhoh's user avatar
  • 6,101
1 vote
0 answers
60 views

Can a single photovoltaic semiconductor junction ever produce a voltage much above it's own ...

A simple model for a photovoltaic cell is a current source with a series resistor, and a few more items. The current from the current source is some fairly constant proportionality constant of the ord …
uhoh's user avatar
  • 6,101
0 votes
1 answer
283 views

Do III-V based photovoltaics "glow" (photo-luminesce) when illuminated but not loaded?

In this nice answer I started to learn about how the silicon photovoltaics cells on the International Space Station are managed. In that case, the cells are generally either delivering useful power to …
uhoh's user avatar
  • 6,101
16 votes
4 answers
2k views

Born & Wolf; Alkali metals transparent to UV? Cesium transparent to blue?

Most optics texts will mention that alkali metals can become transparent in the near ultraviolet in the sections on reflections from metals, plasma frequency, and electron density. I remembered this a …
uhoh's user avatar
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